I thought a couple night shots might also be interesting. These are just on the D700, but show high ISO performance. Last night I put the camera on the tripod, with the 14-24 lens and shot these comparisons at 1600 and 6400 ISO.
Then just the porch at 3200 and 6400ISO. I'm pretty impressed with this high ISO performance. If you're going to be shooting night shots, and you can see how this would translate to concert shots, the D700 definitely shows its stuff.